Here is the full list of all 38 Heavy Burger achievements.
Play 100 Custom Games
Start a 4-Player Game
Beat Any Hard Challenge Without Collecting Speed Bonuses
Kill 3 Opponents With One Laser Shot
Beat Any Medium Challenge Without Dodging
Beat Any Medium Challenge Without Shooting
Complete the Easiest Single-Player Challenge
Beat All Hard Challenges
Beat All Single Player Challenges
Complete the Seaside Slam Single-Player Challenge
Complete the Drowning In Enemies Single-Player Challenge
Complete the A Crime Well Done Single-Player Challenge
Bank $100 in any Hard Challenge
Complete the Carroty Champ Single-Player Challenge
Get 100 kills in any Hard Challenge
Beat Any Hard Challenge Without Dying
Complete the Surrounded with an 8-Ball Single-Player Challenge
Complete the Martial Law Single-Player Challenge
Complete the Pop 'N Lock Single-Player Challenge
Complete the Barrel of Monkeys Single-Player Challenge
Beat All Medium Challenges
Complete the Police State Single-Player Challenge
Complete the Kicked in the Cue Ball Single-Player Challenge
Complete the Chop 'N Wok Single-Player Challenge
Complete the Pocket Aces Single-Player Challenge
Complete the Medium Rare Single-Player Challenge
Complete the Chasecake Single-Player Challenge
Complete the Quadsimoto Single-Player Challenge
Complete the Double Trouble Single-Player Challenge
Beat All Easy Challenges
Complete the Pool Party Single-Player Challenge
Clear the table in Side Pocket
Complete the All My Children Single-Player Challenge
Complete the Maze Craze Single-Player Challenge
Complete the Grandma's First Rodeo Single-Player Challenge
Complete the Softer Than Jam Single-Player Challenge
Complete the Harder Than Jelly Single-Player Challenge
Complete the Tutorial Single-Player Challenge